3646749 has 4 divisors (see below), whose sum is σ = 4862336. Its totient is φ = 2431164.

The previous prime is 3646739. The next prime is 3646751. The reversal of 3646749 is 9476463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3646749 - 2⁵ = 3646717 is a prime.

It is a d-powerful number, because it can be written as 3³ + 6⁸ + 4⁷ + 6⁸ + 7⁴ + 4⁹ + 9⁴ .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607789 + ... + 607794.

It is an arithmetic number, because the mean of its divisors is an integer number (1215584).

Almost surely, 2^3646749 is an apocalyptic number.

It is an amenable number.

3646749 is a deficient number, since it is larger than the sum of its proper divisors (1215587).

3646749 is a wasteful number, since it uses less digits than its factorization.

3646749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215586.

The product of its digits is 108864, while the sum is 39.

The square root of 3646749 is about 1909.6463023293. The cubic root of 3646749 is about 153.9224464742.

The spelling of 3646749 in words is "three million, six hundred forty-six thousand, seven hundred forty-nine".